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如何改进 tikZ 图形箭头渲染？

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如何改进 tikZ 图形箭头渲染？

我有以下 tikZ 图：

在此处输入图片描述

由。。。生产：

\tikzset{actor/.style={
        rectangle,
        minimum size=6mm,
        very thick,
        draw=red!50!black!50,
        top color=white,
        bottom color=red!50!black!20
    }}
    \tikzset{arrow/.style={
        -latex, thick
    }}
        \begin{tikzpicture}[
             background rectangle/.style={fill=yellow!10,rounded corners=1ex},        show background rectangle,
            node distance=5mm and  8mm
        ]
            \node (Input) [align=center]{GZip\\Stream};
            \node (HeaderParser) [actor, right=of Input] {HeaderParser};
            \node (HeaderCrc) [actor,above =of HeaderParser] {Crc Header};
                    \node (Inflate) [actor, right=of HeaderParser] {Inflate};
            \node (Crc) [actor,above =of Inflate] {Crc};
            \node (FooterParser) [actor,right=of Inflate] {Footer Parser};
            \node (Output) [right=of FooterParser,align=center]{Decoded\\Stream};
            \draw[arrow] (Input.east)--(HeaderParser.west);
            \draw[arrow] (HeaderParser.north)--(HeaderCrc.south);
            \draw[arrow] (HeaderParser.east)--(Inflate.west);
            \draw[arrow] (Inflate.north)--(Crc.south);
            \draw[arrow] (Inflate.east)--(FooterParser.west);
            \draw[arrow] (FooterParser.east)--(Output.west);
            \draw[arrow] (Crc.east)--(FooterParser.west);
        \end{tikzpicture}

除了箭头之外，我对它几乎很满意。我不喜欢箭头末端和两个箭头在同一个节点上结束。我该如何改进？

答案1

这些shorten键允许在节点周围留出更多空间（无需使用outer sep其他黑客）这确实可以净化身材。

-|其次，使用（|-表示另一种方式）使向下的箭头沿直线行进。

east|north|south|west最后，除非您使用曲线，否则不需要，--将被解释为两个对象（在本例中为east -- west和south -- north）之间的最短路径。

所以基本上我会这样做：

\tikzset{actor/.style={
        rectangle,
        minimum size=6mm,
        very thick,
        draw=red!50!black!50,
        top color=white,
        bottom color=red!50!black!20
    },
    arrow/.style={
        -latex, thick, shorten <=2pt,shorten >=2pt
    }
}
\begin{tikzpicture}[background rectangle/.style={
      fill=yellow!10,rounded corners=1ex
  }, 
  node distance=5mm and 8mm]
  \node (Input) [align=center]{GZip\\Stream};
  \node (HeaderParser) [actor, right=of Input] {HeaderParser};
  \node (HeaderCrc) [actor,above =of HeaderParser] {Crc Header};
  \node (Inflate) [actor, right=of HeaderParser] {Inflate};
  \node (Crc) [actor,above =of Inflate] {Crc};
  \node (FooterParser) [actor,right=of Inflate] {Footer Parser};
  \node (Output) [right=of FooterParser,align=center]{Decoded\\Stream};
  \draw[arrow] (Input)--(HeaderParser);
  \draw[arrow] (HeaderParser)--(HeaderCrc);
  \draw[arrow] (HeaderParser)--(Inflate);
  \draw[arrow] (Inflate)--(Crc);
  \draw[arrow] (Inflate)--(FooterParser);
  \draw[arrow] (FooterParser)--(Output);
  \draw[arrow] (Crc)-|(FooterParser);
\end{tikzpicture}

这使：

在此处输入图片描述

最后的解决方法是将之前的两行合并FooterParser，为此您需要这个calc库：

\draw[thick,shorten <=2pt] (Crc)-|($(Inflate.east)!.5!(FooterParser.west)$);

这将产生：

这可能不太好看，但是，它可以用于

答案2

如果您不喜欢结束箭头，您可以更改它：在 pgfmanual 上有一个专门介绍此内容的部分（请参阅 23 Arrow Tip Library，2010 年 10 月 25 日版本）。

对于FooterParser节点的终止连接点，甚至可以指定箭头结束的边界角度。为了更好地理解这一点，请参阅以下答案：通过 tikzmark 宏进行对齐。

请参阅以下 MWE（顺便说一句：发布的不是最小工作示例），其中我使用箭头尖端stealth和端部连接点FooterParser.175：

 \documentclass{article}

 \usepackage{tikz}
 \usetikzlibrary{arrows,backgrounds,positioning}

\tikzset{actor/.style={
        rectangle,
        minimum size=6mm,
        very thick,
        draw=red!50!black!50,
        top color=white,
        bottom color=red!50!black!20
    }}
    \tikzset{arrow/.style={
        -stealth, thick
    }}


\begin{document}

\begin{tikzpicture}[
             background rectangle/.style={fill=yellow!10,rounded corners=1ex},        show background rectangle,
            node distance=5mm and  8mm
        ]
            \node (Input) [align=center]{GZip\\Stream};
            \node (HeaderParser) [actor, right=of Input] {HeaderParser};
            \node (HeaderCrc) [actor,above =of HeaderParser] {Crc Header};
                    \node (Inflate) [actor, right=of HeaderParser] {Inflate};
            \node (Crc) [actor,above =of Inflate] {Crc};
            \node (FooterParser) [actor,right=of Inflate] {Footer Parser};
            \node (Output) [right=of FooterParser,align=center]{Decoded\\Stream};
            \draw[arrow] (Input.east)--(HeaderParser.west);
            \draw[arrow] (HeaderParser.north)--(HeaderCrc.south);
            \draw[arrow] (HeaderParser.east)--(Inflate.west);
            \draw[arrow] (Inflate.north)--(Crc.south);
            \draw[arrow] (Inflate.east)--(FooterParser.west);
            \draw[arrow] (FooterParser.east)--(Output.west);
            \draw[arrow] (Crc.east)--(FooterParser.175);
        \end{tikzpicture}

\end{document}

结果：

在此处输入图片描述

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